<template>
  <header class="header">
    <h1>todos</h1>
    <input id="toggle-all" class="toggle-all" type="checkbox" v-model="biaoji">
    <label for="toggle-all"></label>
    <input class="new-todo" placeholder="输入任务名称-回车确认" autofocus @keydown.enter="enterFn" v-model="task" />
  </header>
</template>

<script>
export default {
  props:['list'],
  data() {
    return {
      task: ''
    }
  },
  methods: {
    enterFn(){
      if(this.task.trim()===''){
        return alert('正确输入')
      }
      this.$emit('addtask',this.task)
      this.task=''
    }
  },
  computed:{
    biaoji:{
        set(val){
          this.list.forEach(item=>item.isDone=val)
        },
        get(){
         return  this.list.every(item=>item.isDone)
        }
    }
  }
}
</script>